Avidyne IFD540 Installation Manual page 149

NOTES:
1. ALL WIRES TO BE 24 AWG OR GREATER UNLESS OTHERWISE NOTED.
2. CONNECTING TWO MICROPHONES TO MIC AUDIO HI/LO OR INTERCOM MIC HI/LO AT THE SAME TIME
2
MAY RESULT IN WEAK OR DISTORTED AUDIO. MIC ISOLATION RELAYS ARE RECOMMENDED SO THAT
ONLY ONE MIC IS ACTIVE AT A TIME.
3. RESERVED
4. IF THE AUDIO PANEL DOES NOT HAVE A LO INPUT. IT SHOULD BE CONNECTED TO A GROUND LUG AT
4
THE AUDIO PANEL.
5. THE IFD540 INTERCOM FUNCTION SHOULD ONLY BE USED IF THERE IS NO OTHER INTERCOM SYSTEM
5
IN THE AIRCRAFT.
6. INTERCOM WIRING OPTION:
6
7. THE COM REMOTE TRANSFER INPUT (P1002-15) MAY BE USED FOR EMERGENCY OPERATION OF THE
7
COM TRANSMITTER. IF THE REMOTE TRANSFER SWITCH IS ACTIVE FOR THREE SECONDS, THE ACTIVE
COM FREQUENCY WILL CHANGE TO 121.50 MHZ.
REFER TO MANUFACTURER'S DOCUMENTATION FOR COMPLETE PINOUT AND INTERCONNECT
8.
INFORMATION. PINOUT OF OTHER UNITS SHOWN FOR REFERENCE ONLY.
9. SHIELDS FOR AUDIO CABLES SHOULD BE GROUNDED AT ONE END (WITH LEADS LESS THAN 3.0
INCHES) AND LEFT FLOATING AT THE OTHER END. IF SHIELDED AUDIO CABLE IS CARRIED THROUGH
DISCONNECT, CARRY SHIELD GROUND THROUGH DISCONNECT ON SEPARATE PIN.
600-00299-000
IFD540
P1002
COM MIC KEY 4
NC
COM MIC AUDIO HI 6
INTERCOM MIC HI 5
COM MIC AUDIO 18
Page 2 of 2
Page 149 of 198
IFD5XX Installation Manual
MICROPHONE
SWITCH (DPDT)
COM
MIC JACK
INTERCOM
Revision: 02